In Wattos R8 32bits lxde, i have the same problem.
Installing WattOS autologing I indicated that I wanted, but after installation asked me loging and password.
The problem I've seen in the file lightdm.conf
Commands:
autologin-user = user
autologin-user-timeout = 0
are written, by default, in the section:
[VNCServer]
instead of writing in the section:
[SeatDefaults]
and for that does not work autologin